Re: [PyOpenGL-Users] glGetUniformIndices

[Urs S. <p-e...@we...>]

Am Montag, den 16.01.2012, 12:41 -0500 schrieb Mike C. Fletcher:
> On 12-01-16 12:32 PM, Hans Wurst wrote:
> > Hi guys,
> >
> > I've written the following wrapper-code for glGetUniformIndices:
> >
> > @lazy( glGetUniformIndices )
> > def glGetUniformIndices(baseOperation, program, uniformNames):
> >     num = len(uniformNames)
> >     maxLen = max([len(x) for x in uniformNames])+1
> >     names = ((ctypes.c_char * maxLen) * num)()
> I believe you want ctypes.c_char_p * num here, with this formulation 
> you'd then need to create a new array of pointers each of which was 
> pointing at the beginning of the row for that value.  Don't have a 
> test-case handy to test that assumption, though.
> >     for i,name in enumerate(uniformNames):
> >         names[i].value = name
> >     c_names = ctypes.cast(ctypes.pointer(ctypes.pointer(names)),
> >                           
> > ctypes.POINTER(ctypes.POINTER(OpenGL.constants.GLchar)))
> >     obuff = (ctypes.c_uint32 * num)()
> >     print ctypes.byref(obuff)
> >     print c_names
> >     print "Before", baseOperation.__name__
> >     baseOperation(program, num, c_names, ctypes.byref(obuff))
> >     print "After", baseOperation.__name__
> >     return [o.value for o in obuff]
> HTH,
> Mike
> 
Sorry for double-mailing my answer, but I think something was wrong with
my mail client. I don't understand your suggestion, do you have some
example code or can go into more detail please? Code would be great.

Thx